Biological Age is defined as the chronological population age with the same life expectancy. Biological age, also referred to as physiological age, takes all lifestyle factors into consideration, including diet, exercise and sleeping habits, to name a few. Biological age builds on the Life Expectancy dataset, which are calculated from the Mortality Ratios. The values are for the mid-point of each age range. The difference in biological age is from the population life expectancy. Care should be taken when there is any prior selection, for example directly through medical underwriting or indirectly through income.